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【单选题】
银汞合金充填后,嘱勿用该牙咀嚼食物的时间是A.
3小时内
B.
6小时内
C.
12小时内
D.
24小时内
E.
48小时内
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【简答题】如果λ噬菌体Cro蛋白和λDNA相混，就会形成Cro-λDNA，在Cro蛋白加入之前在DNA中加入腺嘌呤复合物或溴化乙锭，将会出现什么情况?
【简答题】近年来,温室效应、臭氧空洞、酸雨沉降、荒漠化、水资源的滥用等一系列全球性环境问题,对人类生存与发展构成严重威胁,成为重大的全球性问题,结合所学的知识谈谈全球气候变化有哪些现象以及造成的影响,应当采取什么样的措施。
【单选题】Ag 2 CrO 4 饱和溶液的Ksp=（）。
A.
［Ag ＋ ］·［CrO 4 － ］
B.
［Ag ＋ ］ 2 ·［CrO － ］ 4
C.
［Ag ＋ ］ 2 ·［CrO 4 2－ ］
D.
［Ag ＋ ］·［CrO 4 2－ ］
【多选题】What would you do if you were introduced to someone and you didn’t know whether or not to shake hands?
A.
You could keep your hands in your pockets in order to avoid shaking hands.
B.
You could wait and see what the other person does and then you could do the same (shake or don’t shake hands).
C.
You could be the first person to give your hand.
【简答题】已知：Kspθ(Ag2 CrO4)=1．1×10-12，Kspθ(AgCl)=1．8×10-10。则反应：Ag2 CrO4(s)+2Cl-====2AgCl(s)+CrO42-的Kθ= ________________。
【简答题】What would you do if you had an accident in your daily life? It is important for you to get some knowledge about first aid in your daily life. If a person has an accident, he / she needs medical care ...
【单选题】Would you know __ if there was a fire in the building.
A.
what to do
B.
how to do
C.
when to do
D.
where to do
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